Not open to the required pressure to a predetermined pressure and does not close, this is due to incorrect alignment of Weifang valve safety valve, should re-adjust the amount of compression springs or weights or change the position of the spring can be. 3, the pressure continues to rise after the exhaust valve. This is mainly due to emissions from the safety valve does not reach the emissions equipment, should use appropriate safety valve. 4, valve or vibration frequency hopping. This is mainly because the spring rate is too large, the switch to the appropriate spring stiffness. 5, do not return after the discharge valve seat reasons: safety valve spring bent stem, the valve installation caused by malposition or stuck, should be re-assembled. Operating items found leaking valve when there are signs of Shandong valve should be replaced or serviced. Prohibit the use of increased load (eg adjusting screw on the lever or safety valve lever to add a heavy and so over-tighten the spring-loaded safety valve) methods to eliminate leaks. Regularly check the operation of the valve leaks, jamming and spring rust and other irregularities, and to observe the adjustment screw cover and adjusting ring set screw lock nut is loose, if a problem should promptly take appropriate measures. Set the safety valve should note the following: (1) there is gas in the container, when the liquid two-phase material safety valve should be installed in the gas phase portion. (2) safety valve for venting flammable liquid outlet valve of the tank should be connected to the accident. When the discharge of the material is a high temperature fuel, its receptacle should be a corresponding protection facilities. Valve Co., Ltd. Shandong Everbright valve manufacturer specializing in the production, welcome new and old customers to order our products! Weifang safety valves, safety valves, valve type Everbright Everbright Limited provided by Shandong valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) strong, credible, Shandong Weifang ball industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Everbright valve into the brilliant and you work for a better future!